In many animals, visual signals are ____, meaning they have become exaggerated and stereotyped over evolutionary
time, forming an easily recognized visual display.
a. tactile
b. conditioned
c. ritualized
d. habituated
e. operants
ANSWER: c
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Loose connective tissue proper contains
A) fixed and wandering cells B) a tight framework C) parallel, packed fibers D) a solid ground substance E) only elastic fibers
The carrying capacity of an area decreases if
A. the waste products are not removed. B. the birthrate lowers. C. more food is available. D. All of these answers are true.
In mammalian females, which of the following is a structure essential for reproduction?
a. the urethra b. the anus c. the uterus d. the stomach
Which of the following directly supply the electrons for the electron transfer system?
a. FADH2 and NADH b. pyruvate and acetate c. ATP and ADP d. various enzymes